Fig. 7. The protective actions of rhapontin on Na⁺/K⁺-ATPase activity against oxidative damage in erythrocyte membranes. Results are expressed as enzyme unit in nmol Pi/mg/min. Data represent mean values ± S.D. from four independent experiments. C: control without the test compound, T: 1 mM Trolox. Results are compared against the control with oxidative damage by one-way ANOVA followed by Dunnett's test. *, P <0.05; ***, P <0.001.